252 Transactions British Mycological Society. 



nosa (Chev.) Rost. var. glohosa Lister, on moss, a form of 

 Physarum globuliferum (Bull.) Pers. showing in its pale drab 

 tint an approach to the nearly allied P. murinum Lister, 

 Comatricha laxa Rost., Lachnoholiis congestus (Somm.) Lister 

 and Margarita metallica (Berk. & Br.) Lister. Mr Knight ex- 

 hibited a fine development of Badhamia lilacina (Fr.) Rost. 

 found in the plasmodium stage on Sphagnum in a bog in North 

 Wales. 



LICHENS OF THE BASLOW FORAY. 



By A. Lorrain Smith, F.L.S. 



The members of the Mycological Society naturally place fungi 

 in the first rank for collection, and districts are chosen for the 

 annual foray in which the fields and woods are likely to yield 

 good gatherings of these fleeting plants: lichens have therefore 

 not been considered in the choice of locality. They flourish only 

 in pure air, and at Selby, in the 1918 foray, their absence was 

 very striking, and was due to the smoke-clouds from manu- 

 facturing towns near-by. Better times for lichenologists were 

 expected from Derbyshire, but Baslow lay within the influence 

 of Sheffield smoke and lichens again were scarce. The atmo- 

 sphere seemed to be absolutely pure, but the presence of sooty 

 impurities was amply manifested by the condition of one's 

 hands after a few hours' collecting. 



The first day's excursion, in the immediate neighbourhood 

 of Baslow, yielded the best results. On the stone walls by 

 the road-side, there were numerous specimens of Placodium 

 flavescens and allied yellow forms. Lecanora muralis and 

 L. parella were also found; many of the stones were coated with 

 an undeveloped powdery white thallus. Cetraria glauca was 

 curiously abundant on some of the scattered boulders. Higher 

 up on the moor, Sphaerophorus globosus was collected, with 

 various poorly developed Cladoniae and, on the bare soil, 

 Lecidea gramilosa and L. uligi^iosa. Chatsworth Park proved 

 especially disappointing, as the trees, which in more favourable 

 conditions would have been covered with lichen growths, were 

 quite bare. Lecidea fuligi^iea w?ls noted, on dedid iimher . Other 

 species collected and determined during the expedition were 

 Lecanora varia, Parnieliaperlata, with var. ciliata, P. omphalodes, 

 P. physodes, Cetraria actileata, Cladonia cocci/era, C. fimhriata 

 and Baeomyces rufus. 



